It is hard to deny that evil exists in the world and has therefore been and will continue to be a theme in literature. No one can put evil into words, as it is intangible. Fantastic children's and youth literature plays an important role in literary history, from the fairy tales of the Brothers Grimm to J.K. Rowling's Harry Potter series. The presence of evil is a recurring motif in this context. At the center of most narratives is the struggle between good and evil. In this study, the author examines the characteristics of fantastic children's and youth literature and explores why it also captivates adult readers. Through detailed analyses of classic fantastic works, the book provides insight into the depiction of evil and conveys to the reader a sense of the fascination that evil exerts.